Some godlike champions not getting a lot of picks/bans

I don't see arhi, malphite, Janna, sorraka, shen, graves or ezreal picked or banned often. I can understand Soraka and Janna since Soraka is boring and Janna is hard. Graves seems like a cool new Meta jg. He now has a legit build. Ez adc is top tier at the moment. Ahri and Malphite are fun to play and EZ. Malphite has always been if it's no broken don't fix it. Mabel a visual rework but nothing else. I've only been here since 4.22(estimate) so what would I know. Ez is just a classic average ass adc who is strong now. I don't see them picked a lot. Mid is always lux, talon, zed, or yas. Ahri deletes teams and has high mobility. I've only played like 7 games and I already went 19-7. Malphite is good at setting up. Kills in team fights.Graves kills camps with a few AAs. Shen is getting reworked. Don't know if it's a buff or nerf. So are the not played since they aren't lcs common picks or bans?